From patchwork Tue Mar 25 10:45:20 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Josh Wu X-Patchwork-Id: 3887081 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 45C0B9F334 for ; Tue, 25 Mar 2014 10:52:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5674D2021B for ; Tue, 25 Mar 2014 10:52:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4A02A2020E for ; Tue, 25 Mar 2014 10:52:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753055AbaCYKwV (ORCPT ); Tue, 25 Mar 2014 06:52:21 -0400 Received: from nasmtp02.atmel.com ([204.2.163.16]:17960 "EHLO SJOEDG01.corp.atmel.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753834AbaCYKuz (ORCPT ); Tue, 25 Mar 2014 06:50:55 -0400 Received: from apsmtp01.atmel.com (10.168.254.30) by sjoedg01.corp.atmel.com (10.64.253.30) with Microsoft SMTP Server (TLS) id 14.2.347.0; Tue, 25 Mar 2014 03:50:29 -0700 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Tue, 25 Mar 2014 18:57:51 +0800 From: Josh Wu To: CC: , , , , , , , , , , , , , Josh Wu Subject: [PATCH v2 3/3] [media] atmel-isi: add primary DT support Date: Tue, 25 Mar 2014 18:45:20 +0800 Message-ID: <1395744320-15025-1-git-send-email-josh.wu@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1395744087-5753-1-git-send-email-josh.wu@atmel.com> References: <1395744087-5753-1-git-send-email-josh.wu@atmel.com> MIME-Version: 1.0 Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch add the DT support for Atmel ISI driver. It use the same v4l2 DT interface that defined in video-interfaces.txt. Signed-off-by: Josh Wu Cc: devicetree@vger.kernel.org Reviewed-by: Laurent Pinchart --- v1 --> v2: refine the binding document. add port node description. removed the optional property. .../devicetree/bindings/media/atmel-isi.txt | 50 ++++++++++++++++++++ drivers/media/platform/soc_camera/atmel-isi.c | 31 +++++++++++- 2 files changed, 79 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/media/atmel-isi.txt diff --git a/Documentation/devicetree/bindings/media/atmel-isi.txt b/Documentation/devicetree/bindings/media/atmel-isi.txt new file mode 100644 index 0000000..11c98ee --- /dev/null +++ b/Documentation/devicetree/bindings/media/atmel-isi.txt @@ -0,0 +1,50 @@ +Atmel Image Sensor Interface (ISI) SoC Camera Subsystem +---------------------------------------------- + +Required properties: +- compatible: must be "atmel,at91sam9g45-isi" +- reg: physical base address and length of the registers set for the device; +- interrupts: should contain IRQ line for the ISI; +- clocks: list of clock specifiers, corresponding to entries in + the clock-names property; +- clock-names: must contain "isi_clk", which is the isi peripherial clock. + +ISI supports a single port node with parallel bus. It should contain one +'port' child node with child 'endpoint' node. Please refer to the bindings +defined in Documentation/devicetree/bindings/media/video-interfaces.txt. + +Example: + isi: isi@f0034000 { + compatible = "atmel,at91sam9g45-isi"; + reg = <0xf0034000 0x4000>; + interrupts = <37 IRQ_TYPE_LEVEL_HIGH 5>; + + clocks = <&isi_clk>; + clock-names = "isi_clk"; + + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_isi>; + + port { + #address-cells = <1>; + #size-cells = <0>; + + isi_0: endpoint { + remote-endpoint = <&ov2640_0>; + }; + }; + }; + + i2c1: i2c@f0018000 { + ov2640: camera@0x30 { + compatible = "omnivision,ov2640"; + reg = <0x30>; + + port { + ov2640_0: endpoint { + remote-endpoint = <&isi_0>; + bus-width = <8>; + }; + }; + }; + }; diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c index f4add0a..d6a1f7b 100644 --- a/drivers/media/platform/soc_camera/atmel-isi.c +++ b/drivers/media/platform/soc_camera/atmel-isi.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include @@ -33,6 +34,7 @@ #define VID_LIMIT_BYTES (16 * 1024 * 1024) #define MIN_FRAME_RATE 15 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE) +#define ISI_DEFAULT_MCLK_FREQ 25000000 /* Frame buffer descriptor */ struct fbd { @@ -885,6 +887,20 @@ static int atmel_isi_remove(struct platform_device *pdev) return 0; } +static int atmel_isi_probe_dt(struct atmel_isi *isi, + struct platform_device *pdev) +{ + struct device_node *node = pdev->dev.of_node; + + /* Default settings for ISI */ + isi->pdata.full_mode = 1; + isi->pdata.mck_hz = ISI_DEFAULT_MCLK_FREQ; + isi->pdata.frate = ISI_CFG1_FRATE_CAPTURE_ALL; + isi->pdata.data_width_flags = ISI_DATAWIDTH_8 | ISI_DATAWIDTH_10; + + return 0; +} + static int atmel_isi_probe(struct platform_device *pdev) { unsigned int irq; @@ -896,7 +912,7 @@ static int atmel_isi_probe(struct platform_device *pdev) struct isi_platform_data *pdata; pdata = dev->platform_data; - if (!pdata || !pdata->data_width_flags) { + if ((!pdata || !pdata->data_width_flags) && !pdev->dev.of_node) { dev_err(&pdev->dev, "No config available for Atmel ISI\n"); return -EINVAL; @@ -912,7 +928,11 @@ static int atmel_isi_probe(struct platform_device *pdev) if (IS_ERR(isi->pclk)) return PTR_ERR(isi->pclk); - memcpy(&isi->pdata, pdata, sizeof(struct isi_platform_data)); + if (pdata) + memcpy(&isi->pdata, pdata, sizeof(struct isi_platform_data)); + else /* dt probe */ + atmel_isi_probe_dt(isi, pdev); + isi->active = NULL; spin_lock_init(&isi->lock); INIT_LIST_HEAD(&isi->video_buffer_list); @@ -1014,11 +1034,18 @@ err_alloc_ctx: return ret; } +static const struct of_device_id atmel_isi_of_match[] = { + { .compatible = "atmel,at91sam9g45-isi" }, + { } +}; +MODULE_DEVICE_TABLE(of, atmel_isi_of_match); + static struct platform_driver atmel_isi_driver = { .remove = atmel_isi_remove, .driver = { .name = "atmel_isi", .owner = THIS_MODULE, + .of_match_table = atmel_isi_of_match, }, };